Speed control



April 23, 1940. GRQB 7 2,198,247

- SPEED couThoL Filed Oct. 50, 1936 2 Sheets-Shet 1 CHI] Ema/Mom bm'amir; Qpelo April 23, 1940. GRQB Q 2,198,247

SPEED CONTROL Filed Oct. 30, 1936 2 Sheets-Sheet 2 bcb l v amin Q1 05 5% 97/.

Pam-.1 A 23, 1940 2,198,247

UNITED STATES PATENT OFFICE SPEED CONTROL Benjamin Grob, Grafton, Wis., assignor of seven-tenths to Grob Bros, Grafton, Wis., a partnership composed-oLTheodoi-e Grob and himself, and one-fifth to Eugenev H. Simpson, West Allis, Wis., and one-tenth to Robert E. Stoll, Wauwatosa, Wis.

Application October 30, 1936, Serial No. 108,345

'12 Claims. (Cl. Isl-.01)-

Automotive vehicles now in use employ a sys- V-12 engine; tem of foot brakes which are entirely separate Fig.4 is adiagram-matic view showing the brakand distinct from the engine. 'To operate the ing position of the control lever, with the clutch brakes and bring the vehicle to a stop; it is necengaged and the hand throttle in off posi- 1 essary to'remove the right foot from the action; I

o celerator, place it on the brake pedal and de- Fig. 5 is a view similar to Fig.4 but with the press the latter. Each time the brake is dehand throttle set for idling;

pressed wear takes place on the brake bandsand Fig. 6 is a view similar to Fig. 4 but with the drums, necessitating the eventual replacement clutch disengaged; and of the bands. Fig. 7 is a view similar to Fig. 4 but showing 15 The compression of the motor when in secthe gas being fed into the engine. ond gear has long beenrecognized as a most Referring to the-drawings, and more particueflective brake, due to its uniform drag on both larly to Fig. 1, the engine comprises a cylinder rear wheels. If the ignition is left on, however, block 10, having a-water jacket ll surrounding the braking action is never complete, as the carylind rs IL A r nk case M is ach will continue to move forward indefinitely, wherethe block at the lower end of the cylinders, and as if the ignition is turned oii, gas accumulates houses a crank shaft IS. A piston l8 has a conv in the muiller, causing an explosion in the mufiier' necting rod i9 connected thereto by a wrist pin when the engine is again started. Such an ex- 20 and is adapted to turn the crank shaft l6. plosion is quite apt to damage the muflier. and produce -power. The upper ends of the cyl- 25 High gear, on the other hand, affords little inders 12 are closed by a cylinder head 23 which or no braking action, and this is amplified when may be secured to the top of the cylinder block the ignition is on. ill by bolts (not shown).

One object of the present invention is to pro- In t e engine Shown a mixture of gasoline duce a speed control for automotive vehicles vapor and air is burned- The air entersan air which is operated from a single pedal. cleaner '25 and passes through a butterfly valve Another object of the invention is to produce 26 in the carbureter 21. In passing through the a speed control for automotive vehicles which carbureter 21 the air stream absorbs and vaporis sure and positive in its action. izes the. gasoline in a manner well known in the 4 A further object is to produce a speed art. The valve 26 is actuated by a link 21' which 36 trol for automotive vehicles which is entirely inis connected to a control mechanism to be dedependent of the friction brakes. scribed below. From the carbureter the mix-- A further object of the invention is to reduce ture of as li e and air pass s int an intake the wear on the ordinary friction brakes on an. manifold 28 which distributes t mixture to the aut ti vehicle. I various cylinders l2 through inlet passages 30.

another object is to promote cooling of Each passage 30 is controlled by a valve 3| which motor of an automotive vehicle. i a? 33? proper time by a cam ven y e engine. g I

A further object is to provide a .means of I After being compressed the gases are ignited posing of free carbon deposited in the engine by a sparklplug 34 and after expanding are cylinders Gut-mg burning of the fuel pelled irom the cylinder past an exhaust valve 45 Other objects will become apparent on 35 through an exhaust passage 36. The passages .Sidemtion of the following specification m 38 from all cylinders enter an exhaust manifold taken in conjunction with the acsompanying" M, which collects the burnt gases and delivers drawings mustrate Preferred form the them to a single exhaust pipe 38 which leads to 59 a mufiier (not shown).

In the drawings: t The valve 35 is opened mechanically by a cam Fig. i is a transverse cross-section through a 39, which may be mounted on the same shaft. as typical four-cycle automobile engine showing the g the cam 32. v I speed control attached thereto; According to the present invention a by-pass A This invention relates to automotive vehicles, and more particularly to a speed control for use on automotive vehicles employing an internal combustion engine.

as Fig. 2 is a diagrammatic view of the speed control as applied to a four cylinder or a V-8 engine;

Fig. 3 is a view similar to Fig. 2 showing the speed control as applied to a six-cylinder or a so is provided around the carbureter 2i and is controlled by a valve 42, sothat when the valve 42 is open air is drawn through the by-pass into the engine cylinders l2 without passing through the carbureter.

The exhaust pipe 38 likewise has a valve 44 operable therein, which is adapted to completely close the exhaust pipe. The control for the operation of the valves 26, 42 and 44 is so interconnected that the valve 42 is fully closed and the valve 44 fully open as long as the valve 26.

is in open or partially open position. The valves 42 and 44 operate simultaneously through a linkage 45 in such a manner that the valve 42 opens as the valve 44 closes. These, movements are effected'by a control mechanism generally des- 58" so that when the lever 53 moves away from the stop 51, the valve 42 is opened and the valve 44 is closed, and as the lever 52 moves away from the stop 56. the butterfly valve 26 is opened to supply gas to the engine.

The levers 52 and 53. are actuated by a single lever which is pivoted on the pivot i4, and moves the lever 53 away from its stop 51 when moved to the left as seen in Fig. 1, and moves the lever 52 away from the stop 56 when moved to the right. This'arrangement assures the gas. being entirely oi! before either the'valve 42 is opened or the valve 44 is closed.

The lever 60 is actuated primarily from the foot accelerator I. in the automobile, so that when the accelerator is depressed a link is rotated about its fixed pivot 61 and moves the lever 6| by means of a link 88 tothe right, as seen in Fig. 1. This movement, inturn. opens the butterfly valve 26 and causes more gas to be supplied to the engine. As the pressure on the throttle is released, a spring II returns the lever 60 to the neutral position. Further release of pressure on the accelerator permits the spring 10 tomove the lever 60 to the left, as seen in Fig. 1. 'Such movement actuates the lever 53 and simultaneously opens the by-pass valve 42 and closes the exhaust manifold valve 44. v

Opening the by-pass valve 42 removes all suction from the butterfly valve'-26 and hence all gasoline supply is automatically cut off from the en e.

Closing of the valve 44 builds up pressure the exhaust manifold against which the pistons 10 must work. The back pressure so built upforms a brake which is utilized to decelerate the vehicle. The pressure in the exhaust manifold never reaches dangerous proportions due to the fact, that the air which is compressed and exhausted from one cylinder (considering first a four cylinder engine) acts against-the pressure of the spring of the exhaust valve of the cylinder means to return the lever 53 to neutral position. It may be mounted on the dashboard and connected through a flexible cable 14 or other suitable means to the lever 60 in such a way that when pulled out it limits the movement of the lever 60 toward the braking position. The rod of the throttle 13 may be notched as at 15, which I note is engaged by a releasable stop 16 at the idling position of the control mechanism. By

pulling out further on the hand throttle, the stop Hi releases and the lever 60 is moved to the right,

as seen in Fig. 1, to increase the gas supply to the engine. Suflicient f ction is provided between the hand throttle 1: nd the dashboard to overcome the effect of the spting I0.

' The second means, generally designated It, to return the lever 53 to neutra'h. 'tion and start the engine idling, is operated from the clutch pedal l9.' The means 18 may comprise a push rod slidably received in a pair of guides II and 82. The guide ii is fixed relative to the frame of the machine, whereas-the guide 82 is pivotally mounted on the clutch pedal of the machine, as

shown. i

A stop 83 is fixed on'the rod Ill and abuts the guide 8| to limit the forward movement of the rod 80. A spring 84 is mounted around the rod 80 with the two ends abutting the stop 83 and the guide 82 respectively. so that the initial movement inwardly of the clutch pedal moves the rod N to 3( the left, asshown in Fig. 1, untfl the stop It abuts the guide ill. Y

Inmoving to the left, the rod 80 contacts a depending arm 85 of the lever 60 and returns the control mechanism to idling position. v The various positions of the operating mechanism are shown in Figs. 4, 5, 6 and 7. l

- Fig. 4 shows the hand throttle pushed in to permit the compression brake to work. In this figure the position of the valves 28, 42 and 44 is m shown when the foot is removed from both the accelerator and the clutch pedal. Fig. 6 is similar to Fig. 4 and shows the hand throttle in the same position as Fig. 4, but with the clutch disengaged. It will be noted that the lever 53 .has been brought up to idling position with the by-pass valve 42 closed and the exhaust manifold valve 44 open, thus permitting the englue to idle in the usual manner.

, with the hand throttle pulled out to the 0!! podwhich would normally be firing. opens that valve against the spring pressure and builds up pressure withinthat cylinder.

Two'means are provided to return to the neutral position in which the by-pass valve 42 is closed'and the exhaust manifold valve 44 is'open. In this position'the engine would be drawing some gas through the carburetor and running at tion. In this position the valve 42 is prevented from opening and the valve 44 is maintained fully open.

Fig. "I shows gas being applied by the accelerator.

If a six cylinder engine is used, three exhaust manifolds should be employed to give best results. Each manifold should connect one pair of cylinders as shown in Fig. 3, and be controlled by an t exhaust manifold valve 44. The exhaust manifold valves '44 are connected to operate in unison.

As shown in Fig. 2, a four cylinder engine requires but a single, manifold with one exhaust manifold-valve 44. A V-eight engine requires two exhamtmanifolds with a separate volvefor each, one mani- I ,fold for each group of four cylinders. thelever l3 Itwillthusbeseenthatthisinventionprovides means to keep the engine comparatively while atthe same time prevents wear and tear on the brakes. The highlycom air heavily laden withoxygen which enters the cylinder during the braking action and is further compressed. rises momentarily to'a I clean. tively, means constantly urging said levers to- Having thus described the invention it will be ward each other, means to stop said levers at the realized that it is susceptible to various changes points in their movements where said valves are and modifications falling within the range of closed, and a third lever mounted on said axis mechanical equivalents. It is not therefore deand adapte o actuate i Other v sired to limit the invention to the precise form 5. A device as recited in claim 4 including herein shown and described, but only'by the scope means nnect n a last named v to the of the appended claims. accelerator pedal whereby depressing the acceler- What is claimed as new and desired 'to secure t pe h gas V v and release ef'the by Letters t nt celerator closes the gas valve and opens the by- I. In an automotive vehicle having an internal pass valve. u combustion engine including a fuel supply, an ac- 6. In an automotive vehicle having an internal celerator governing said supply, an air intake combustion engine including a fuel supply, an passage, an exhaust passage, and a clutch pedal, accelerator governing said supply, an exhaust a speed control for said vehicle comprising, a bypassage for burnt gases and a clutch pedal, a pass for said fuel supply, a valve adapted to speed control for said vehicle comprising, avalve :0 compl ly Shut 11 1 p n S id ar-pa s. a Valve in said exhaust passage, means to completely in said exhaust p ssa means Operated by the shut oil? the supply of fuel to said engine, means foot accelerator to simul ane y p n Said operatedby said accelerator to operate said last pass valve and close said valve in the exhaust named means t t ,11 fuel supply t m Passage when th fuel Supply is at a minimum engine, and to simultaneously start the closing of and means connec d w Said clutch Pedal to said valve, and means connected to said clutch prevent operation of said last named means upon to counteract 'said last named means upon depressing the clutch pedal. pressing t t In an aut9mt1ve vehicle having an internal 7. In an automotive vehicle having an internal combustion engine including a fuel supp an combustion engine m m a fuel supply, an an accelerator governing said supply. a 8 intake accelerator governing the supply of fuel to said passage, an exhaust Passage, hand throttle and engine, an exhaust passage, a hand throttle and a clutch pe al, a Speed said vehicle a foot pedal, a speed control for said vehicle comcomprising, a valve in Said 8 intake Passage prising, a valve in said exhaust passage, adapted a p e to control the flow Of @5011 the to prevent the passage of substantially all exn in a Y-D adapted lead 3am haust gas when said valve is closed, means to gas intake passage between the fuel supply and completely t ofl said fuel supply. means the engine, a valve adapted to open and allow air nesting the accelerator with said valve and said to flow thro h Said -P when S first last named means whereby release of the acnamed valve is clo a Valve in said exhaust celerator operates the means tocompletely cut a passage adapted to close simultaneously with the 05 the fuel supply and simultaneously close said opening of the by-pa s Valve, means to control valve, and means connected to said pedal to the operation of the valves from the accelerator. render th valve closing means inoperative upon and means, including the clutch ped l. to maindepressing the pedal. tain the exhaust valve p n and the bit-Pass 8. In an automotive vehicle having an internal valve closed independent of the accelerator. bu tion engine including a fuel supply, an

3. In an automotive vehicle having an internal accelerator governing said. supply, an intake combustion engine including e fuel Supply, 911 passage, an exhaust passage, and a clutch pedal, accelerator governin said Supply, gas intake 9. speed control for said vehicle comprising, a bypassage, an exhaust pass e, 8 h n thr -9 pass for said fuel supply, a valve to control the '60 a clutch pe speed control for Said Vehicle flow of air through said by-pass, a valve in said compr a valve in said 8 intake Passage exhaust passage, means operated by the foot acadapted to control the flow of gasoline to the l ator to simultaneously open said by-pass eng ne. a y-P adapted to lead airlnto said valve and close said valve in the exhaust pasgas intake passage between the fuel supply and sage when the fuel supply is at a minimum, and the engine, a valve adapted to Open nd allow ilf means connected with said clutch pedal to preto flow through said 'by-Pass w en aid fir vent operation of said last named means upon named valve is closed, a valve in said exhaust depressing the clutch pedal.

passage adapted to close simultaneously with the '9. In an automotive vehicle having an internal opening of the by-pass valve, means to control combustion engine including a fuel supply, an no the operation of the valves from the accelerator, accelerator governing said supply, a gas intake means, including the hand throttle, to maintain passage, an exhaust passage, a hand throttle, and the exhaust valve open and the by-pass valve a clutch pedal, a speed control for said vehicle closed independent of the accelerated 17nd comprising, a valve in said gas intake passage means, including the clutch pe l. to m intain adapted to control the flow of gasoline to the 66 the exhaust valve open and the by-pass valve engine, a by-pass adapted to lead air into said closed independent of said accelerator and said gas intake passage between the fuel supply and throttle. the engine,'a valve completelyclosing saidzby- In an automotive Vehicle including n pass and adapted to open and allow air toflowjffs ternal combustion engine having a fuel source, through said by-pass when said first named valve a gas intake passage, a valve in said passage to govern the flow of fuel from said source to the open subsequently to the closing of the first named valve, a control mechanism comp n a pair of levers pivoted on a common axis, means connecting said levers with said valves respecis closed, a valve ,in said exhaust passage adapted to closesimultaneously with the opening of the engine, a by-pass-adapted to supply air to said by-pass valve, means to control the operation-of}; the valves from the accelerator, and meanain cluding the clutch pedal, to maintain the exhaust":

intake passage between the fuel source and said engine, and a valve in said by-pass adapted to ternal combustion engine including a clutch, a

pedal governing the operation of said clutch, a fuel supply for said engine, and an accelerator controlling said fuel supply, a speed control for. said vehicle comprising, means controllable by said accelerator to build up pressure or-bacli pressure within said engine, and means operable by said pedal to eliminate back pressure within the'engine when the clutch is disengaged.

11. In an automotive vehicle having an in.-'

pedal governing the operation of said clutch, a

fuel supply for said engine, and an accelerator governing the -fiow of fuel through said intake to said engine, a speed control for said vehicle gas to said engine, means governed by said accelerator to control the flow of gases from said exhaust and means actuated by said clutch pedal.

to open said exhaust and to shut off the supply of non-combustible gases to the engine.

12. In an automotive vehicle having an internal combustion engine including an intake passage, an exhaust passage, a clutch, a clutch pedal governing the operation of said clutch, a fuel supply for said engine and an accelerator governing the .flow of fuel from said supply to said engine, a speed control for said vehicle comprising, means governed by said accelerator to supply a non-combustible gas to said engine, means governed by said accelerator to control the the flow of gas from said exhaust and means BENJAMIN GROB. 

